Oracle Database Support for Server Virtualization Updated December 7, 2009

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1 <Insert Picture Here> Oracle Database Support for Server Virtualization Updated December 7, 2009

2 Support Policy Server virtualization software allows multiple operating system instances to run on the same server. Oracle provides this functionality for x86 platforms with it s Oracle VM offering. Several third parties also have offerings that provide similar functionality. This document describes support provided by Oracle for its software running in third party server virtualization solutions. Except as described in this document Oracle does not test or certify third party server virtualization solutions. For Oracle customers running supported third-party server virtualization solutions, which have been certified with Oracle Software products, Oracle will provide equivalent level support to what is available for the native hardware, and jointly work with the virtualization vendor to resolve any problems¹. For Oracle customers running other third-party server virtualization solutions which have not been certified with Oracle software products. Oracle will provide support for issues that are known to occur on the native OS, or can be demonstrated not to be a result of running on the server virtualization software. Oracle may request that the problem be reproduced on the native hardware. RAC only supported on validated configurations 1 A valid support agreement with both parties is required

3 Server Virtualization Technologies Server Virtualization Hardware Partitions Physical Partitions Electrical/Physical isolation Native HW speed Dedicated resources Virtual Partitions Near native HW speed More fine grain resources Shared I/O, rest dedicated Shared Partitions Shared cpu resources Dynamic cpu cycle allocation Virtual Machines Binary translation Run time translation Any HW/Any OS Usually slower Para-virtualization Special OS build Any HW/Linux only Faster Hardware assisted Latest HW/Any OS Hybrid mode Any combination of other modes OS Partitions OS Partitions Must run same OS,Some support different levels of same OS Limited fault isolation De-privileged kernel may not be compatible with all apps Near native speed

4 Dynamic Operations Available on native hardware New capabilities 1. CPU resources Add/remove cpu(s) Increase/reduce cpu cycles 1. VM migration Online migration of a virtual machine 2. Memory resources Add/remove memory 2. Save/Restore Stop -> Save -> Restore Instant Save -> Restore 3. I/O resources Add/remove I/O card Add/remove device

5 ISV Support Levels (Sx) 1. Static Configuration Support The program runs in a static virtual environment. Dynamic operations are not supported. 2. Dynamic Reconfiguration Safe The program does not fail as a result of resource changes (CPU, memory, I/O). Never Changes Infrequent Changes 3. Dynamic Reconfiguration Aware The program is designed to recognize and dynamically adapt to resource changes (CPU, memory, I/O). 4. Optimized and integrated The program has been modified to deliver new or optimized capabilities in a virtualized environment. Frequent Changes

6 Supported Virtualization Solutions VENDOR Product Virtualization Type Processor Platform Operating System(s) Hard Partition Licensing Basic Support Live Migration DB RAC DB RAC Oracle Oracle Virtual Machine Virtual Machine (PV, HVM, Hybrid) Virtual Machine (HVM, Hybrid) X86, X64 Linux Pinned Only Yes Yes 2,3 Yes 1 Test Windows Pinned only Test No Test No 1 - Supported with Oracle Static support only. 3 - PV mode only. Save/Restore of a running database not yet supported. HP IBM SUN npar Physical Partition IA, PA HP-UX Yes Yes Yes N/A N/A vpar Virtual Partition IA, PA HP-UX Yes Yes Yes N/A N/A Integrity Virtual Machines Dynamic LPAR Micropartitions Virtual Machine IA HP-UX Capped only Yes No N/A N/A Virtual Partition Power AIX Yes Yes Yes Yes Test Shared Partition Power AIX Capped only Yes Yes Yes Test VIO Server Shared I/O Power N/A N/A Yes Yes N/A N/A WPAR OS Partition Power AIX No Yes No No No zvm Shared Partition zseries Linux No Yes Yes N/A N/A Dynamic System Domains Logical Domains Physical Partition Sparc Solaris Yes Yes Yes 2 N/A N/A Virtual Partition Sparc Solaris No Yes Yes N/A N/A Local Solaris Containers OS Partition Sparc, X86, X64 Solaris Capped only Yes Yes N/A N/A Not all Oracle database releases supported in each environment. Please check certify tab of metalink.oracle.com for release specific info

7 Special considerations for NUMA NUMA is enabled by default with NUMA capable environments When the database detects multiple cells at startup, NUMA mode is automatically enabled NUMA detection is based on H/W or OS APIs, depending on platform. NUMA mode should never be used in shared cpu environments NUMA can be disabled by setting the following init.ora parameters: _enable_numa_optimization = 'FALSE' _db_block_numa = 1 When enabled ccnuma imposes some restrictions on dynamic reconfiguration support, these are: Only cells visible at startup will be ccnuma optimized, these are called base cells Dynamic reconfiguration during startup and shutdown is not supported. Dynamic reconfiguration during normal operations is limited as follows: Cells, cpus and memory can be added anytime Base cells must not be removed. The last cpu on a base cell must not be removed. Floating cells (added after last DB startup) can be removed. Note: there is no way to distinguish between base and floating cells. Automatic dynamic reconfiguration (i.e. as provided by WLM tools) must be disabled.

8 Oracle VM - Single Instance Database Support Configuration Oracle Database and above Guest OS : Oracle Enterprise Linux 4.x, 5,x Red Hat Linux 4.x, 5.x Support for both 32 and 64 bit Oracle VM 2.1 and above Support for both para-virtualized (PV) and hardware virtualized (HV) modes Use PV drivers in both modes Support for Windows guests and Live Migration is currently planned on Oracle Database only once testing is completed.

9 Oracle VM - RAC Database Support Configuration Oracle Database or above Guest OS : OEL or RHEL 5.1 or above Support for 32 and 64 bit modes Oracle VM or above Only para-virtualized mode supported Static mode support only Live Migration, dynamic resource changes (CPU/Memory) currently not supported Configuration Best Practices Each RAC node must be deployed on a separate physical server for production environments Use physical block devices for database files CPU over-commit up to 2 times is supported but not recommended.

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